Reverse a string using recursion in Python

I’ve always found recursion somewhat unnatural to think about, but somehow satisfying when I can see it unfolding in my mind – this simple exercise in reversing a string using recursion is a case in point…

>>> def reverse(str):
    if len(str)==1:
        return str
    else:
        return reverse(str[1:])+str[0]

>>> reverse('hello')
'olleh'
>>> 

Of course,  this is just a thought experiment.  In real-world Python, you’d do this:

>>> 'abcdef'[::-1]
'fedcba'
>>>